Abstract
We consider the Lommel functions sμ,ν(z) for different values of the parameters (μ,ν). We show that if (μ,ν) are half integers, then it is possible to describe these functions with an explicit combination of polynomials and trigonometric functions. The polynomials turn out to give Padé approximants for the trigonometric functions. Numerical properties of the zeros of the polynomials are discussed. Also, when μ is an integer, sμ,ν(z) can be written as an integral involving an explicit combination of trigonometric functions. A closed formula for F12(12+ν,12−ν;μ+12;sin(θ2)2) with μ an integer is given.
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